believe it or not i have tried Racquetfuel strings, particularly the "control" poly. I don't have very much money, so i haven't many options to give you a best conception of its playing characteristics based on the playtesting of other strings. I can say, however, that the strings last a relatively long time, but like all polys, lose their tension very fast(in comparison with redcode). One downside of the string was, at the time, that i couldn't use it in a cost effective manner because i couldn't buy a reel. Hopefully that has changed/